body{
	margin: 0 auto;
}

.auto-img{
	width: 100%;
	height: auto;
	display: block;
}

.plane{
	width: 414px;
	height: 680px;
	margin: 30px auto 0;
	box-shadow: 2px 2px 12px 1px #ddd;
}
.start{
	height: 100%;
	background: url("../images/startgame.png") no-repeat center center;
	background-size: cover;
	position: relative;
}
.begin{
	position: absolute;
	top: 500px;
	left: 0;
	right: 0;
	margin: 0 auto;
	width: 200px;
	height: 40px;
	line-height: 40px;
	text-align: center;
	background-color: #8F9293;
	font-size: 1.4em;
	border-bottom: 3px solid #6F6F6F;
	border-radius: 5px;
	cursor: pointer;
	color: #fff;
}
.begin:active{
	border-bottom: none;
}

.game{
	height: 100%;
	position: relative;
	overflow: hidden;
	cursor: none;
	display: none;
}

.myplane{
	position: absolute;
	left: 0;
	top: calc(680px - 73px);
	width: 60px;
	height: 73px;
	z-index: 3;
}

.bg{
	position: absolute;
	left: 0;
	width: 100%;
	height: 100%;
	background: url("../images/bg.png") no-repeat center center;
	background-size: cover;
	z-index: 1;
}
.bg1{
	top: 0;
}
.bg2{
	top: -680px;
}

.layer{
	width: 100%;
	height: 100%;
	position: absolute;
	left: 0;
	top: 0;
	z-index: 4;
}